Dragline walking mechanism with improved planetary transmission
CA 2260302 C · Owner: Joy Global Surface Mining Inc · Inventors: Kallenberger, Harvey J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dragline comprising a main housing, a moving mechanism for moving the main housing over the ground and a planetary transmission driving the moving mechanism the planetary transmission including a transmission housing a sun gear, a ring gear and planet gears centered on a center axis the planet gears meshing with the ring gear and the sun gear so that the planet gears rotate about the center axis the planet gears drivingly connected to a carrier the carrier including a low-friction coating on a carrier annular surface and a carrier cylindrical surface the low- friction coating reducing friction between the carrier and the transmission housing.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 25, 1999 and granted April 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 25, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.